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POM MC270 矿物填料,高流动

添加时间:2013-06-04  信息来源:http://www.simibc.com/  作者:苏州希普能塑料
泰科纳POM MC270
 
CELCON® MC270 CD3068 BLACK
CELCON® MC270 CF3500 NATURAL
 
CELCON MC270 | POM | Mineral Reinforced
 
Description
Celcon® MC270 is a mineral coupled acetal copolymer designed for applications requiring improved stiffness, lower mold shrinkage and reduced warpage while maintaining the mechanical performance characteristics of an unfilled Celcon® M270 grade.
 
Other Processing
Injection Molding
Standard reciprocating screw injection molding machines with a high compression screw (minimum 3:1 and preferably 4:1) and low back pressure (0.35 Mpa/50 PSI) are favored. Using a low compression screw (I.E. general purpose 2:1 compression ratio) can result in unmelted particles and poor melt homogeneity. Using a high back pressure to make up for a low compression ratio may lead to excessive shear heating and deterioration of the material.
 
Melt Temperature: Preferred range 182-199℃ (360-390℉). Melt temperature should never exceed 230℃ (450℉).
 
Mold Surface Temperature: Preferred range 82-93℃ (180-200℉) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120℃ (250℉) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65℃/150℉) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25℃ (80℉). In general, mold surface temperatures lower than 82℃ (180℉) may hinder weld line formation and produce a hazy surface or a surface with flow lines, pits and other included defects that can hinder part performance.
 
ISO Data Mechanical properties Value Unit Test Standard
Phys Density 1480 kg/m³ ISO 1183
Mold shrinkage - parallel 1.9 % ISO 294-4
Mold shrinkage - normal 1.6 % ISO 294-4
Water absorption (23℃-sat) 0.75 % ISO 62
Humidity absorption (23℃/50%RH) 0.2 % ISO 62
Mech Mechanical properties Value Unit Test Standard
Tensile modulus (1mm/min) 3150 MPa ISO 527-2/1A
Tensile stress at yield (50mm/min) 57 MPa ISO 527-2/1A
Tensile strain at yield (50mm/min) 7 % ISO 527-2/1A
Flexural modulus (23℃) 3100 MPa ISO 178
Flexural strength (23℃) 77 MPa ISO 178
Charpy notched impact strength @ 23℃ 5.4 kJ/m² ISO 179/1eA
Charpy notched impact strength @ -30℃ 4.5 kJ/m² ISO 179/1eA
Notched impact strength (Izod) @ 23℃ 5.5 kJ/m² ISO 180/1A
Therm Thermal properties Value Unit Test Standard
Melting temperature (10℃/min) 165 ISO 11357-1,-2,-3
DTUL @ 1.8 MPa 101 ISO 75-1/-2
Coeff.of linear therm. expansion (parallel) 1 E-4/℃ ISO 11359-2
Coeff.of linear therm. expansion (normal) 1.2 E-4/℃ ISO 11359-2
SpecProd Test specimen production Value Unit Test Standard
Processing conditions acc. ISO 9988-2 - Internal
 
Processing
Pre Drying
Drying time (h):3
Drying temperature (℃):80 - 100
 
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